An Oracle Data Cartridge for Moving Objects
نویسندگان
چکیده
Composition of time and space in a unified data framework results into spatio-temporal databases. Spatiotemporal Database Management Systems (STDBMS) are able to process, manage and analyze spatiotemporal data. Spatial TAU 1 (STAU), developed in [Pel02], provides spatio-temporal functionality to Oracle10g Object-Relational Database Management System (ORDBMS). Although STAU is designed in a way that it can also be used as a pure temporal or a pure spatial system, its main functionality is to support modeling and querying of moving objects. Such a collection of data types and their corresponding operations are defined, developed and provided as a data cartridge using the extensibility interface of Oracle10g. This paper presents HERMES Moving Data Cartridge (HERMES-MDC), the core component of STAU system architecture. HERMES-MDC integrates two other data cartridges, namely the TAU temporal data cartridge and Oracle’s spatial data cartridge. It introduces time-varying geometries that change their position and/or extent in space and time dimension, either discretely or continuously. HERMES-MDC extends PL/SQL, the data definition and manipulation language of Oracle10g, with spatio-temporal semantics. The resulted query language is applied to a case study related with truck motion analysis formulating a benchmarking framework for the evaluation of next generation fleet management systems.
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